If you feel that your glans is always itchy after jerking off, it is mostly due to the following reasons: 1. Before jerking off, you do not pay attention to personal hygiene and cleanliness, and excessive jerking off force breaks the glans skin, which leads to fungal infection, bacterial infection, and itchy glans symptoms; 2. Long-term frequent and excessive jerking off makes your immune system low, and your glans becomes sensitive, which leads to bacterial infection more easily; 3. Having glansitis, prostatitis, and urethritis can also lead to itchy glans after jerking off, and in this case, it is recommended to go to the hospital’s Department of Urology for relevant examination and treatment.